When comparing Double Commander vs Altap Salamander, the Slant community recommends Double Commander for most people. In the question“What are the best file managers for Windows?” Double Commander is ranked 10th while Altap Salamander is ranked 13th. The most important reason people chose Double Commander is:
You can use same tool in all desktop OS environments.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Multi-platform (Linux, Windows, MacOS X)
You can use same tool in all desktop OS environments.
Pro Source code is available (true free software)
If the developer loses interest there is at least the possibility that someone else will pick up the torch.
Pro Configurable
Lots of options allow you to configure DC the way it suits you best: Tools, Fonts, Colors, Hotkeys, Mouse, Fileviews, Plugins, Layout, Toolbars, Tabs, Icons etc.
Pro Directory Hotlist
Save shortcuts to folders. Organize them in a treeview with submenus. Define a name and sorting for each entry.
Pro Powerful tcmd-like search tool (alt+F7)
Pro tcmd-like multi-rename tool (CTRL+M)
Pro DC uses TCmd plugin API
so you can use documentation from Total Commander for writing plugins. WCX (packer), WDX (content), WFX (file system), WLX (lister).
Pro Closely follows TotalCommander UX
For instance, the 'Settings | Layout' pane is quasi-identical to TCs.
Pro Very sophisticated
Although it is lightweight and simple to use, it can do very sophisticated tasks, like copying files from directories which have a certain extension or file size or have a certain text pattern in them. Also, it's very customizable and stable.
Pro It's that good, you can replace tcmd on windows too
Pro Source code written in (Object) PASCAL
It's all a matter of perspective. I'm not for an argument about IDE's, frameworks etc, but to me that's a big plus. I think it should be a tie, it's either a pro or a con or should that be neither a pro nor a con. It just depends on context.
Pro Looks very polished and consistent
Pro Very feature-rich
Pro Very stable, even preview versions
Pro Intuitive two-pane interface
The program features a dual-pane interface that allows you to easily move files between views.
Pro As of July 2019 now freeware
Pro Very fast
No delay is noticable in the user interface.
Pro License is good on multiple machines
Can be used at home and work.
Pro Extensive keyboard shortcut support
Pro Built-in FTP and SFTP
The program has built in support for a variety of common network protocols (such as FTP, FTPS, SCP and SFTP) for file transferring over the internet.
Pro Powerful bookmark support
Easy bookmark usage, e.g., Shift+1 selects the first directory. The bookmarked directories are also available in the usual popups to switch the left/right drive (Alt+F1/F2).
Pro Built-in archive support (zip, rar, etc)
Pro Customizable colors
Different colors can be assigned to compressed files or files with a certain name pattern.
Pro Customizable with own external tools
Pro Copy and move operations can work in background
Pro Automation plugin
Enables user to automate repetitious actions via JScript and VBScript (via windows script engines already installed). There is also support for Perl, PHP, Python and Ruby (Arton's ruby must be installed to have the Action script support)
Pro Encrypt files
Pro Built-in undelete plugin
Cons

Con Apparently only one developer
Con Freeze after mouse double-click on directory list item
Con Much slower on Linux and Mac than on Windows
Con Source code written in Pascal language
But this does not affect users negatively. It's just programmers problem.
Con Not developed anymore for Mac
Con Can't edit files on remote FTP servers
Con Slow development
Rarely updates.
Con Text Viewer does not support UTF-8
Con Winscp not available for x64 version
Winscp plugin is available only for x86 version and missing @x64.
Con Hard-coded shortcuts
Shortcuts are hard-coded and therefore can't be changed by the user.
Con Image viewer is basic
Con No tabs in dual panes
There are no tabs available in the dual panes view, which can be a time-saver for some users.
Con No Unicode support
Unicode was promised many years ago, but due to slow development, still nothing.
Con Is only available for Windows
There is no full replacement for Linux or OS X.
